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| Parameter | SKFQJ 344 N2MA220 × 460 × 88 mm | FAGQJ344-N2-MPA220 × 460 × 88 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | SKF | FAG |
| Designation | QJ 344 N2MA | QJ344-N2-MPA |
| Product family | Angular contact ball bearings | — |
| Detailed type | Four-point contact ball bearing with locating slots | Four-point contact bearing |
| Series | — | QJ344 |
| Bore diameterd | 220 mm | 220 mm |
| Outside diameterD | 460 mm | 460 mm |
| WidthB | 88 mm | 88 mm |
| Basic dynamic load ratingC | 780 kN | 900 kN |
| Basic static load ratingC0 | 1400 kN | 1650 kN |
| Fatigue load limitPu | 32 kN | 51 kN |
| Reference speednref | — | 1080 r/min |
| Limiting speednG | 2400 r/min | 2430 r/min |
| Mass≈m | 78 kg | 85.4 kg |
| Precision class | — | PN — Normal (ISO 492:2023) |
| Sealing | Without | — |
| Cage | Machined brass | MPA — Solid brass cage, outer ring guided |
| Bearing material | Bearing steel | — |
| Lubricant | None | — |
| Minimum operating temperatureTmin | — | -30 °C |
| Maximum operating temperatureTmax | — | 200 °C |
| Capabilities & suitability | ||
| Radial load capacity | — | Yes |
| Axial load capacity in one direction | — | Yes |
| Axial load capacity in both directions | — | Yes |
| Suitable for grease lubrication | — | Yes |
| Suitable for oil lubrication | — | Yes |
| Unsealed design | — | Yes |
| Largebearing | — | Yes |
| Dimensions | ||
| Contact angle | 35.0 ° | — |
| Minimum chamfer dimensionrmin | — | 5 mm |
| Minimum chamfer dimensionrmin | — | 0.197 in |
| Shoulder diameter outer ringD1 | — | 378 mm |
| Shoulder diameter outer ringD1 | — | 14.882 in |
| Shoulder diameter inner ringd1 | — | 304.15 mm |
| Shoulder diameter inner ringd1 | — | 11.974 in |
| Distance between the apexes of the pressure conesa | — | 238.1 mm |
| Distance between the apexes of the pressure conesa | — | 9.374 in |
| Hight retaining slotan | — | 15 mm |
| Hight retaining slotan | — | 0.591 in |
| Width retaining slotbn | — | 12.5 mm |
| Width retaining slotbn | — | 0.492 in |
| Radius retaining slotrn | — | 2.5 mm |
| Radius retaining slotrn | — | 0.098 in |
| Angle retaining slot | — | 45 ° |
| Contact angleα | — | 35 ° |
| Engineering — Abutment dimensions | ||
| Abutment diameter shaftd a | min. 240 mm | — |
| Abutment diameter housingD a | max. 440 mm | — |
| Fillet radiusr a | max. 4 mm | — |
| Engineering — Calculation data | ||
| Calculation factorA | 6.2 | — |
| Limiting valuee | 0.95 | — |
| Calculation factorX | 0.6 | — |
| Calculation factorY 0 | 0.58 | — |
| Calculation factorY 1 | 0.66 | — |
| Calculation factorY 2 | 1.1 | — |
| Engineering — Dimensions | ||
| Shoulder diameter inner ringd 1 | ≈ 308 mm | — |
| Shoulder diameter outer ring/ inner diameter housing washerD 1 | ≈ 372 mm | — |
| Distance pressure point(s)a | 238 mm | — |
| Locating slot depth outer ringh | 15 mm | — |
| Locating slot width outer ringb | 12.5 mm | — |
| Corner radius locating slotr 0 | 2.5 mm | — |
| Chamfer dimension inner ringr 1,2 | min. 5 mm | — |
| Logistics | ||
| Product net weight | 78.0 kg | — |
| eClass code | 23-05-08-05 | — |
| UNSPSC code | 31171531 | — |
| Main Dimensions & Performance Data | ||
| Basic dynamic load rating, radialCr | — | 900,000 N |
| Basic dynamic load rating, radialCr | — | 202,338.129 lbf |
| Basic static load rating, radialC0r | — | 1,650,000 N |
| Basic static load rating, radialC0r | — | 370,953.237 lbf |
| Fatigue load limit, radialCur | — | 51,000 N |
| Fatigue load limit, radialCur | — | 11,465.827 lbf |
| Manufacturer Identity | ||
| Schaeffler Product Code | — | 366784 |
| Base Type | — | QJ344 |
| Old Designation | — | ["QJ344N2MPA"] |
| Gpsd Group | — | S03 |
| Product Line Id | — | 14 |
| SAP material number | — | 0192626710000 |
| Base product | — | 230508AD41 |
| Bearing X designation | — | QJ344-N2-MPA |
| Mounting Manager ID | — | QJ344-N2-MPA |
| Grease application ID | — | QJ344-N2-MPA |
| Mounting dimensions | ||
| Minimum diameter shaft shoulderda min | — | 240 mm |
| Minimum diameter shaft shoulderda min | — | 9.449 in |
| Maximum diameter of housing shoulderDa max | — | 440 mm |
| Maximum diameter of housing shoulderDa max | — | 17.323 in |
| Maximum fillet radiusra max | — | 4 mm |
| Maximum fillet radiusra max | — | 0.157 in |
| Product characteristics | ||
| Design, bearing outer ringN2 | — | Two retaining grooves in the outer ring on one side |
| Tolerance classPN | — | Normal (ISO 492:2023) |
| Dimensional / heat stabilizationS1 | — | Rings dimensional stabilized up to 200° |
| Axial internal clearanceCN | — | Group N (CN) |
| Product identity | ||
| Official product category | Angular contact ball bearings | — |
| Official taxonomy path | /products/rolling-bearings/ball-bearings/angular-contact-ball-bearings/four-point-contact-ball-bearings | — |
| Structure group ID | BAQ_001 | — |
| Available from SKF | Yes | — |
| Remanufacturable | Yes | — |
| Product Identity | ||
| Construction | — | Four point contact bearing QJ3..-N2-MPA, holding grooves, solid brass cage |
| Short Description | — | Four-point contact bearing |
| Properties | ||
| Contact type | Four-point contact | — |
| Number of rows | 1 | — |
| Locating feature, bearing outer ring | Locating slot | — |
| Ring type | Two-piece inner ring and one-piece outer ring | — |
| Matched arrangement | No | — |
| Universal matching bearing | No | — |
| Axial internal clearance | CN | — |
| Material, bearing | Bearing steel | — |
| Coating | Without | — |
| Relubrication feature | Without | — |
| Indicative carbon footprint for new product | 289.0 kg CO 2 e | — |
| Technical Data | ||
| Bore Diameter (D) | — | 220 mm |
| Outside Diameter (D) | — | 460 mm |
| Width (B) | — | 88 mm |
| Basic Dynamic Load Rating, Radial (Cr) | — | 900,000 N |
| Basic Static Load Rating, Radial (C0R) | — | 1,650,000 N |
| Operating Temperature Min. (Tmin) | — | -30 °C |
| Limiting Speed (Ng) | — | 2,430 1/min |
| Operating Temperature Max. (Tmax) | — | 200 °C |
| Reference Speed (Nϑr) | — | 1,080 1/min |
| Angle Retaining Slot (Angle Retain) | — | 45 ° |
| Hight Retaining Slot (An) | — | 15 mm |
| Radius Retaining Slot (Rn) | — | 2.5 mm |
| Fatigue Load Limit, Radial (Cur) | — | 51,000 N |
| Minimum Diameter Shaft Shoulder (Da Min) | — | 240 mm |
| Shoulder Diameter Inner Ring (D1) | — | 304.15 mm |
| Maximum Diameter Of Housing Shoulder (Da Max) | — | 440 mm |
| Minimum Chamfer Dimension (Rmin) | — | 5 mm |
| Maximum Fillet Radius (Ra Max) | — | 4 mm |
| Shoulder Diameter Outer Ring (D1) | — | 378 mm |
| Contact Angle (Α) | — | 35 ° |
| Distance Between The Apexes Of The Pressure Cones (A) | — | 238.1 mm |
| Width Retaining Slot (Bn) | — | 12.5 mm |
| Temperature range | ||
| Operating temperature min.Tmin | — | -30 °C |
| Operating temperature min.Tmin | — | -22 °F |
| Operating temperature max.Tmax | — | 200 °C |
| Operating temperature max.Tmax | — | 392 °F |
Independent reference comparison based on the manufacturer data currently loaded. Always verify current limits, tolerances and suffix definitions with the official source before engineering selection.